Soil sampling device



Feb. 4, 1941. R J 2,230,808

\ SOIL SAMPLING DEVICE I Filed Oct. 28. 1938 s Shuts-Shoot 1 FIQJA. F "3.2. FIG.2A.

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Feb. 4, 1941. MQHR 2,230,808

SOIL SAMPLING DEVICE Filed Oct, 28, 1938 3 Sheets-Sheet 2 -INVENTOR ATTORNEY 6' Feb. 4, 1941. H. A. MOHR SOIL SAMPLING DEVICE F iled Oct. 28, 1938 s Shets-Sheet 3 F IG.& J;

INVENTOR ATTORNEYS Patented Feb; '4, 1941 son. SAMPLING DEVICE Henry A rthur Mohr Waban, Mass assignor to Raymond Concrete Pile Company,New York,

'N Y.'," a corporation of New Jersey Application October 28, 1938, Serial No. 237,382

10 Claims.

This invention pertains to a device for obtain ing samples of soil at various depths below ground level. The present practice in obtaining samples is usually to drive a tubular casing to the desired depth; to remove the contents of the casing; to, lower through the casing a pipe having on its lower end a sampling "spoon; to drive the spoon into the soil by means of a drop weight on the upper end of the pipe; and then to with- 10 draw the spoon with the soil sample within it. 7 Diiliculty has been encountered in obtaining large samples except in soil having certain favorable physical properties, and then even at best the quality of the samples and success of the operation has'been uncertain.

The diillculty arises not in getting the desired sample into the spoon, but in raising the spoon to ground level without losing part or all of its contents.

'the lower end oi'the spoon with a gate or valve 1 adapted to permit a full diameter sample to enter the spoon, in combination with means for closing the gate to prevent loss 01' any part or the 25 sample while the spoon is being raisedto ground level.

Further and other objects and advantages will be apparent from the specification and claims,

and from the accompanying drawings which 11- 30 lustrate what is now considered a preferred embodiment of the invention.

Figures 1 and 1A show the exterior of the spoon. s

Figs. 2 and 2A are cross-sections on line 2-2 and 2A-2A of Figs. 1 and 1A, respectively.

Fig. 3 is an enlargeddetail-view of the lower 'partot Figi m ifll Fig. 41s across-section n line 4-4 of Fig. 3. .Fig. 5 is ade'tail view on line s-s oIFig. a. 7 Fig.6 is-a yiew similar, to Fig:- 3 Iwiththe parts in di'fierent positionsduringwithdrawal oi'the .s qcn. 2 a y J Fig. 7 is v-afviewon line 1-915 of Fignqfi.

An object of the present invention is to provide Fig. 8 isafldetail view onilin'e- 8-.3"ot Figig'l; Referrin'gfito the drawin'gs, 10 is the drive 'pipe' *-attach'ed ma ed -l2 of the spoon. Pipe Iiilis.

provided wit vent holes '1 l4. Projecting dowm r The lower end of shell I6 is thickened as at 28 and is internally threaded as at 30 for attach ment of a ring-like drive shoe 32 having a readily replaceable cutting edge 34. The inside diameter oi. 34 is no greater than the inside diameter of 5 32 l and controls the outside diameter of the sample. The lower part of ring 32 is counterbored as at 36 (Fig. 6) to provide a circumferential recess in the inner wall of member 32. Within this recess 10 are four gates 33 as indicated in the full lines of Fig. 3 and in the shaded areas of Fig. 4. Each gate is provided at its lower end with a pair of trunnions 40 about which the gate is adapted to swing inwardly and downwardly, as indicated by the arrows 42 in Fig. 3.' The gates are spaced from each other by arcuate spacers 44 in a circumierential groove 45 which also serves to accommodate trunnions 40. One spacer 44, as indicated at the lower left in Fig. 7, is in two pieces '48, 43, each held in place by a screw 50 and thereis a space 52 between 46 and 48 so that by removing a screw 50 the released block 48 or 43 may be moved circumferentially to permit moving spacers 44 circumferentially, thus providing clearance whereby any gate 38 may be re moved and replaced.

With the above structure in mind it will be understood that when the spoon is driven into the ground it will be filled with a cylindrical sample of soil, the diameter of which, when entering the spoon, is controlled by the inside diameter of cutter 34. When the driving operation is completed, the spoon will befull of soil and gates 38 will be in their home positions as indicated by full lines in Fig. 3. The next step in the operation is to actuatethe gates '50 that they will prevent the captured sample from dropping out of the spoon while the spoon ls'gbeing raised to ground level. The gate operating mechanism will now be described.

Thegates are actuated by the operator on the I ground by means of wires passing down and outside the spoon and around the gates within the spoon so that tension on the wires will swing the gates downwardly on their trunnions 40.

The arrangement will be readily understood from Figs. 3 and 4. An annular recess 54 is provided in the inner wall 36 of shoe 32 and in that recess are two loops of wire passing behind all gates 38. One wire is designated 56 and the other 58. The free ends of the loops are conducted to ground level through suitable passages and slots in member 32 and then through'spacedapart tubular guides 60 on the outside of the automa Calls 0 the horizdh a posi on of Figs.

spoon. When tension is applied to the wires by the operator, the loops will be drawn to the broken line position 01 Fig. 4, thus forcing gates I 38 to their broken line positions of Fig. 3. With 5 most soils the gates in the position of Fig. 3 will prevent the sample above the gatesfrom dropping from the spoon during its withdrawal, but if there should any incipient down ardtmovement the w d 6 and 7, thus stopping all movement of the sa ple. out off the sample.

In practice, the'agaEteS-T'f the opening. 7

the spoon while it is being withdrawn .A vie of th At the same time the wire loops servet'o To prevent a vacuum iniitheltbore Eholei bel'oxvts mi eiwh s dsodon for obtaining a sample of soil comprising in combination, an outer tubular shell and an internal removable lining; said lining comprising disconnected sections having the same outside diameter with a variable inside diameter increas- 5 ing from bottom to top.

thenea ch of said sections having the same outide di t and an internal diameter less tha m iately above it. 15 I ;e class described, comprising, nfa's'poon adapted for driving into ';thergrciundiforbbtaining a sample of soil, means a the lower endof said spoon for supporting the *s'arnpla'vvhen said means is in closed position, 20

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shear out. n g n 3 1-5 grz 'j gyi g i:ph fiq ,7 .55 FE o co. .m: i in combination, a spoon adapted for driving into 1 $99 181;tee-obta nin aaempie otso l.

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